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Set 8 of 10 · Questions 211-240 of 285

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JEE Main Chemistry · Aldehydes & Ketones · Set 8 (Q211-240)

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  1. 211.
    Identify the compound ' ' in the following sequence of reactions.
    1. (1)Propanal
    2. (2)Propanone
    3. (3)Butanal
    4. (4)Butanone
  2. 212.
    Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  3. 213.
    The intermediate compound in the following chemical reaction is [NEET 2021]
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 214.
    Identify A in the following chemical reaction.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  5. 215.
    A compound of molecular formula reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  6. 216.
    What is ' ' in the following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 217.
    "P" is an optically active compound with molecular formula . When 'P' is treated with 2, 4-dinitrophenylhydrazine, it gives a positive test. However, in presence of Tollens reagent, "P" gives a negative test. Predict the structure of "P".
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  8. 218.
    Aman has been asked to synthesise the molecule
    (x).He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare "x". Predict the suitable alkene that can lead to the formation of "".
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 219.
    An acyl halide is formed when reacts with an
    1. (1)amide
    2. (2)ester
    3. (3)acid
    4. (4)alcohol
  10. 220.
    With reference to the scheme given, which of the given statments(s) about T, U, V and W is (are) correct?
    1. (1)T is soluble in hot aqueous NaOH
    2. (2)U is optically active
    3. (3)Molecular formula of W is
    4. (4)V gives effervescence on treatment with aqueous
  11. 221.
    in the following reactions are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 222.
    The major product (P) in the following reaction is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 223.
    Consider the given reaction, Identify 'X' and 'Y' :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 224.
    The correct structure of product 'A' formed in the following reaction.

    (Ph is –)
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  15. 225.
    A primary alcohol was reacted with pyridinium chlorochromate (PCC), which resulted in a product . The product on treatment with ammonical silver nitrate solution produces.
    1. (1)Anhydride of carboxylic acid
    2. (2)Aldehyde
    3. (3)Amide
    4. (4)Carboxylate anion
  16. 226.
    Identify the product ' ' in the following reaction.
    Toluene
    1. (1)Benzal chloride
    2. (2)Benzaldehyde
    3. (3)Benzyl alcohol
    4. (4)Benzoic acid
  17. 227.
    Statement I: Aldehyde on reaction with HCN gives Cyanohydrin.
    Statement II: Cyanohydrin is a compound which consists of hydroxy and cyano groups on the same carbon.
    Choose the correct answer from the following with reference to above statements.
    1. (1)Both statements I and II are false
    2. (2)Both statements I and II are true
    3. (3)Statement I is true and Statement II is false
    4. (4)Statement I is false and Statement II is true
  18. 228.
    What are ' ' and ' ' in the following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  19. 229.
    Identify major product " " formed in the following reaction :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  20. 230.
    Consider the given reaction, the product 'X' is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  21. 231.
    What is the product of following reaction?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  22. 232.
    The major products and in the following reaction sequence are
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 233.
    Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds :
    1. (1)1-Pentene
    2. (2)2-Pentene
    3. (3)2-Methyl-2-pentene
    4. (4)2-Methyl-1-pentene
  24. 234.
    When undergoes intramolecular aldol condensation, the major product formed is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 235.
    When 2-butyne is treated with /Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. it produces Y as the major product. Which of the following statements is correct?
    1. (1)X will have higher dipole moment and higher boiling point than Y.
    2. (2)Y will have higher dipole moment and higher boiling point than X.
    3. (3)X will have lower dipole moment and lower boiling point than Y.
    4. (4)Y will have higher dipole moment and lower boiling point than X.
  26. 236.
    The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha‐carbon, is
    1. (1)a carbonyl compound with a hydrogenatom on its alpha‐carbon rapidly equilibrates with its correspondingenol and this process is known as carbonylation
    2. (2)a carbonyl compound with a hydrogenatom on its alpha‐carbon rapidlyequilibrates with its correspondingenol and this process is known as keto‐enol tautomerism
    3. (3)a carbonyl compound with a hydrogen atom on its alpha‐carbon never equilibrates with its corresponding enol
    4. (4)a carbonyl compound with a hydrogen atom on its alpha‐carbon rapidly equilibrates with its correspondingenol and this process is known as aldehyde‐ketone equilibration.
  27. 237.
    The hydrocarbon which can react with sodium in liquid ammonia is:
    1. (1)CH3CH2C≡CH
    2. (2)CH=
    3. (3)CH3CH2C≡CCH2CH3
    4. (4)CH3CH2CH2C≡CCH2CH2CH3
  28. 238.
    Acetaldehyde on reaction with Grignard reagent and subsequent hydrolysis yields
    1. (1) alcohol
    2. (2) alcohol
    3. (3) alcohol
    4. (4)both and alcohols.
  29. 239.
    The number of stereoisomers formed in a reaction of
    (±) Ph(C=O) C(OH)(CN)Ph with HCN is_____.
  30. 240.
    In the given reaction,

    The number of electrons present in the product 'P' is_____.